Display an email form and send plaintext emails through a shortcode.
The shortcode generated for your account will look like '[plainmail header="a header" mailto="your_account_name"](introductory text)[/plainmail]'.
Place that shortcode into a page to generate an email form for the email you associated with that account. Between the [plainmail][/plainmail] tags you can put some introductory text for the form. Note that anything here will be escaped, so html will not render.
When a message is sent to you, you will see the email headers appear in the settings area. The body of the message itself is not saved. Headers are set by default to auto-delete after 24 hours but you can also delete headers manually. Only up to 50 headers will be displayed.